311200030081 has 2 divisors, whose sum is σ = 311200030082. Its totient is φ = 311200030080.

The previous prime is 311200030033. The next prime is 311200030133. The reversal of 311200030081 is 180030002113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 259177719025 + 52022311056 = 509095^2 + 228084^2 .

It is a cyclic number.

It is not a de Polignac number, because 311200030081 - 2¹³ = 311200021889 is a prime.

It is a super-2 number, since 2×311200030081² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (311200030481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155600015040 + 155600015041.

It is an arithmetic number, because the mean of its divisors is an integer number (155600015041).

Almost surely, 2^311200030081 is an apocalyptic number.

It is an amenable number.

311200030081 is a deficient number, since it is larger than the sum of its proper divisors (1).

311200030081 is an equidigital number, since it uses as much as digits as its factorization.

311200030081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 311200030081 its reverse (180030002113), we get a palindrome (491230032194).

The spelling of 311200030081 in words is "three hundred eleven billion, two hundred million, thirty thousand, eighty-one".